Hey Bob, how are you? As we've been talking about this in private... today I confirmed that picking up both State Street and Hoffman Avenue with five bars and a RSSI in the 80s on both sites scanning dispatch 1, data, Tac 1 and 2 Street crime, conversation Channel, supervisors Channel and CIB Channel there is no audio.
160.6 pl103.5 is loud and clear rebrad casting dispatch 1.
I have two theories. The nxdn which is a terrible system is malfunctioning or they have gone encrypted. You will not necessarily hear garbled Transmissions with an SDS 100 except with some P 2 systems. You also may not have a lock onto one of the sites. You also may not have ENC show up on the display for each site. I believe if they are encrypted they are throwing us a bone by giving us dispatch 1 only... on the rebroadcast. That's what they did in 2000 when they went digital they gave my newspaper a Motorola that had only Channel 1 dispatch.
Or they may be using the old UHF system themselves because the nxdn is malfunctioning.
Hard to say, let's see if anyone else knows the scoop... Bob.